Part B At one instant, the electric and magnetic fields at one point of an electromagnetic wave are E = (200î + 350 ĵ – 50k) V/m and What is the value of Bo? Express your answer using two significant figures in microteslas. B = (7.5î – 7.63 + ak)Bo. • View Available Hint(s) ? Bo = µT Submit Request Answer Part C What is the Poynting vector at this time and position? Find the x-component. Express your answer to two significant figures and include the appropriate units. • View Available Hint(s) HA ? Value W/m? Sx =

Part B At one instant, the electric and magnetic fields at one point of an electromagnetic wave are E = (200î + 350 ĵ – 50k) V/m and What is the value of Bo? Express your answer using two significant figures in microteslas. B = (7.5î – 7.63 + ak)Bo. • View Available Hint(s) ? Bo = µT Submit Request Answer Part C What is the Poynting vector at this time and position? Find the x-component. Express your answer to two significant figures and include the appropriate units. • View Available Hint(s) HA ? Value W/m? Sx =

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter34: Maxwell’s Equations And Electromagnetic Waves

Section: Chapter Questions

Problem 42PQ

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We have a plane electromagnetic wave traveling in the +z direction. As you may recall, plane waves have electric and magnetic fields that vary like either sine or cosine, with an argument of (kz−ωt). Our goal here will be to write down the equations describing the electric and magnetic fields in this particular wave, and then use those equations to calculate a few quantities.Let's suppose that at z=0 and t=0, the magnetic field has its maximum value B0 and points in the −y direction. Use that information to decide whether your B -field should vary like sine or like cosine, and write a symbolic vector expression for B . Then write a symbolic vector expression for the E -field that would be in this wave. The definition of the Poynting vector will let you figure the direction of the E -field. a) Now let's suppose that B0 =0.0042 T. What is the scalar value of the electric field at t=0? Note that this could be positive or negative. b) What is the magnitude of the Poynting vector of this…
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